Hierarchical CDRX configuration for dynamic bandwidth part management and power saving

ABSTRACT

Apparatuses, systems, and methods for a base station to perform a method construct dynamic hierarchical sub-configurations of bandwidth parts (BWPs) for use in a connected mode discontinuous reception (CDRX) communication session with a user equipment (UE) device. The base station may configure a first BWP at a baseband frequency associated with the CDRX communication session as a default BWP, a second BWP with a wider bandwidth than the first BWP as a transmission BWP, and one or more third BWPs as resting BWPs. The transmission BWP and the one or more resting BWPs may be configured to periodically override the default BWP as the active BWP for a predetermined number of CDRX cycles. The transmission BWP may be utilized, when activated to perform data transmission by UE device, and the one or more resting BWPs may be utilized, when activated, for performing channel measurements.

PRIORITY CLAIM

This application claims priority to U.S. Provisional Patent ApplicationNo. 62/641,519, titled “Hierarchical CDRX Configuration for DynamicBandwidth Part Management and Power Saving” and filed on Mar. 12, 2018,which is hereby incorporated by reference in its entirety, as thoughfully and completely set forth herein.

FIELD

The present application relates to wireless devices, and moreparticularly to apparatus, systems, and methods for a wireless device todynamically manage a bandwidth part hierarchy.

DESCRIPTION OF THE RELATED ART

Wireless communication systems are rapidly growing in usage. In recentyears, wireless devices such as smart phones and tablet computers havebecome increasingly sophisticated. In addition to supporting telephonecalls, many mobile devices now provide access to the internet, email,text messaging, and navigation using the global positioning system(GPS), and are capable of operating sophisticated applications thatutilize these functionalities.

Long Term Evolution (LTE) has become the technology of choice for themajority of wireless network operators worldwide, providing mobilebroadband data and high-speed Internet access to their subscriber base.LTE defines a number of downlink (DL) physical channels, categorized astransport or control channels, to carry information blocks received frommedia access control (MAC) and higher layers. LTE also defines a numberof physical layer channels for the uplink (UL).

A proposed next telecommunications standard moving beyond the currentInternational Mobile Telecommunications-Advanced (IMT-Advanced)Standards is called 5th generation mobile networks or 5th generationwireless systems, or 5G for short (otherwise known as 5G-NR for 5G NewRadio, also simply referred to as NR). 5G-NR proposes a higher capacityfor a higher density of mobile broadband users, also supportingdevice-to-device, ultra-reliable, and massive machine communications, aswell as lower latency and lower battery consumption, than current LTEstandards. Further, the 5G-NR standard may allow the available bandwidthused in communication between a base station and a UE to be divided intomultiple bandwidth parts (BWP). Consequently, efforts are being made inongoing developments of 5G-NR to take advantage of the flexibility inBWP allocation in order to further leverage power savings opportunities.According, improvements in the field are desirable.

SUMMARY

Embodiments relate to apparatuses, systems, and methods to constructdynamic hierarchical connected mode discontinuous reception (CDRX)sub-configurations for each of a plurality of bandwidth parts (BWPs).

In some embodiments, a 5G NR base station such as a gNB may beconfigured to implement methods for constructing hierarchicalsub-configurations of BWPs in a CDRX communication session with a userequipment device (UE).

The base station may configure a first BWP at a baseband frequencyassociated with the CDRX communication session as a default BWP and mayfurther configure a second BWP with a wider bandwidth than the first BWPas a transmission BWP. The first BWP may be at baseband and may be arelatively narrowband BWP (i.e., it may have a more narrow bandwidththan the second BWP). The UE may be configured to use the default BWP asthe active BWP unless it is overridden by the transmission BWP. Thetransmission BWP may be configured to periodically override the defaultBWP as the active BWP for a predetermined number of CDRX cycles. The UEmay utilize the transmission BWP, when activated, for performing datatransmission.

The base station may further configure one or more third BWPs as restingBWPs, which may periodically override the default BWP as the active BWP.The resting BWPs may be utilized, when activated, for performing channelmeasurements.

The techniques described herein may be implemented in and/or used with anumber of different types of devices, including but not limited tocellular phones, tablet computers, wearable computing devices, portablemedia players, and any of various other computing devices.

This Summary is intended to provide a brief overview of some of thesubject matter described in this document. Accordingly, it will beappreciated that the above-described features are merely examples andshould not be construed to narrow the scope or spirit of the subjectmatter described herein in any way. Other features, aspects, andadvantages of the subject matter described herein will become apparentfrom the following Detailed Description, Figures, and Claims.

BRIEF DESCRIPTION OF THE DRAWINGS

A better understanding of the present subject matter can be obtainedwhen the following detailed description of various embodiments isconsidered in conjunction with the following drawings, in which:

FIG. 1 illustrates an example wireless communication system according tosome embodiments;

FIG. 2 illustrates a base station (BS) in communication with a userequipment (UE) device according to some embodiments;

FIG. 3 illustrates an example block diagram of a UE according to someembodiments;

FIG. 4 illustrates an example block diagram of a BS according to someembodiments;

FIG. 5 is a graph of hierarchical connected mode discontinuous reception(CDRX) sub-configurations using a first and second bandwidth part (BWP),according to some embodiments;

FIG. 6 is a graph of a method for allocating different BWPs as activeBWPs, according to some prior art;

FIG. 7 is a is a graph of a hierarchical CDRX sub-configurations using afirst, second, and third bandwidth part (BWP), according to someembodiments;

FIG. 8 is a flowchart diagram illustrating a method for configurating adefault BWP, a transmission BWP, and/or a resting BWP, according to someembodiments; and

FIG. 9 is an illustration of a method for using BWP sub-configurationsfor performing beamforming tracking, according to some embodiments.

While the features described herein may be susceptible to variousmodifications and alternative forms, specific embodiments thereof areshown by way of example in the drawings and are herein described indetail. It should be understood, however, that the drawings and detaileddescription thereto are not intended to be limiting to the particularform disclosed, but on the contrary, the intention is to cover allmodifications, equivalents and alternatives falling within the spiritand scope of the subject matter as defined by the appended claims.

DETAILED DESCRIPTION

Terms

The following is a glossary of terms used in this disclosure:

Memory Medium—Any of various types of non-transitory memory devices orstorage devices. The term “memory medium” is intended to include aninstallation medium, e.g., a CD-ROM, floppy disks, or tape device; acomputer system memory or random access memory such as DRAM, DDR RAM,SRAM, EDO RAM, Rambus RAM, etc.; a non-volatile memory such as a Flash,magnetic media, e.g., a hard drive, or optical storage; registers, orother similar types of memory elements, etc. The memory medium mayinclude other types of non-transitory memory as well or combinationsthereof. In addition, the memory medium may be located in a firstcomputer system in which the programs are executed, or may be located ina second different computer system which connects to the first computersystem over a network, such as the Internet. In the latter instance, thesecond computer system may provide program instructions to the firstcomputer for execution. The term “memory medium” may include two or morememory mediums which may reside in different locations, e.g., indifferent computer systems that are connected over a network. The memorymedium may store program instructions (e.g., embodied as computerprograms) that may be executed by one or more processors.

Carrier Medium—a memory medium as described above, as well as a physicaltransmission medium, such as a bus, network, and/or other physicaltransmission medium that conveys signals such as electrical,electromagnetic, or digital signals.

Programmable Hardware Element—includes various hardware devicescomprising multiple programmable function blocks connected via aprogrammable interconnect. Examples include FPGAs (Field ProgrammableGate Arrays), PLDs (Programmable Logic Devices), FPOAs (FieldProgrammable Object Arrays), and CPLDs (Complex PLDs). The programmablefunction blocks may range from fine grained (combinatorial logic or lookup tables) to coarse grained (arithmetic logic units or processorcores). A programmable hardware element may also be referred to as“reconfigurable logic”.

Computer System—any of various types of computing or processing systems,including a personal computer system (PC), mainframe computer system,workstation, network appliance, Internet appliance, personal digitalassistant (PDA), television system, grid computing system, or otherdevice or combinations of devices. In general, the term “computersystem” can be broadly defined to encompass any device (or combinationof devices) having at least one processor that executes instructionsfrom a memory medium.

User Equipment (UE) (or “UE Device”)—any of various types of computersystems devices which are mobile or portable and which performs wirelesscommunications. Examples of UE devices include mobile telephones orsmart phones (e.g., iPhone™, Android™-based phones), portable gamingdevices (e.g., Nintendo DS™, PlayStation Portable™, Gameboy Advance™,iPhone™), laptops, wearable devices (e.g. smart watch, smart glasses),PDAs, portable Internet devices, music players, data storage devices, orother handheld devices, etc. In general, the term “UE” or “UE device”can be broadly defined to encompass any electronic, computing, and/ortelecommunications device (or combination of devices) which is easilytransported by a user and capable of wireless communication.

Base Station—The term “Base Station” has the full breadth of itsordinary meaning, and at least includes a wireless communication stationinstalled at a fixed location and used to communicate as part of awireless telephone system or radio system.

Processing Element—refers to various elements or combinations ofelements that are capable of performing a function in a device, such asa user equipment or a cellular network device. Processing elements mayinclude, for example: processors and associated memory, portions orcircuits of individual processor cores, entire processor cores,processor arrays, circuits such as an ASIC (Application SpecificIntegrated Circuit), programmable hardware elements such as a fieldprogrammable gate array (FPGA), as well any of various combinations ofthe above.

Channel—a medium used to convey information from a sender (transmitter)to a receiver. It should be noted that since characteristics of the term“channel” may differ according to different wireless protocols, the term“channel” as used herein may be considered as being used in a mannerthat is consistent with the standard of the type of device withreference to which the term is used. In some standards, channel widthsmay be variable (e.g., depending on device capability, band conditions,etc.). For example, LTE may support scalable channel bandwidths from 1.4MHz to 20 MHz. In contrast, WLAN channels may be 22 MHz wide whileBluetooth channels may be 1 Mhz wide. Other protocols and standards mayinclude different definitions of channels. Furthermore, some standardsmay define and use multiple types of channels, e.g., different channelsfor uplink or downlink and/or different channels for different uses suchas data, control information, etc.

Band—The term “band” has the full breadth of its ordinary meaning, andat least includes a section of spectrum (e.g., radio frequency spectrum)in which channels are used or set aside for the same purpose.

Automatically—refers to an action or operation performed by a computersystem (e.g., software executed by the computer system) or device (e.g.,circuitry, programmable hardware elements, ASICs, etc.), without userinput directly specifying or performing the action or operation. Thusthe term “automatically” is in contrast to an operation being manuallyperformed or specified by the user, where the user provides input todirectly perform the operation. An automatic procedure may be initiatedby input provided by the user, but the subsequent actions that areperformed “automatically” are not specified by the user, i.e., are notperformed “manually”, where the user specifies each action to perform.For example, a user filling out an electronic form by selecting eachfield and providing input specifying information (e.g., by typinginformation, selecting check boxes, radio selections, etc.) is fillingout the form manually, even though the computer system must update theform in response to the user actions. The form may be automaticallyfilled out by the computer system where the computer system (e.g.,software executing on the computer system) analyzes the fields of theform and fills in the form without any user input specifying the answersto the fields. As indicated above, the user may invoke the automaticfilling of the form, but is not involved in the actual filling of theform (e.g., the user is not manually specifying answers to fields butrather they are being automatically completed). The presentspecification provides various examples of operations beingautomatically performed in response to actions the user has taken.

Approximately—refers to a value that is almost correct or exact. Forexample, approximately may refer to a value that is within 1 to 10percent of the exact (or desired) value. It should be noted, however,that the actual threshold value (or tolerance) may be applicationdependent. For example, in some embodiments, “approximately” may meanwithin 0.1% of some specified or desired value, while in various otherembodiments, the threshold may be, for example, 2%, 3%, 5%, and soforth, as desired or as required by the particular application.

Concurrent—refers to parallel execution or performance, where tasks,processes, or programs are performed in an at least partiallyoverlapping manner. For example, concurrency may be implemented using“strong” or strict parallelism, where tasks are performed (at leastpartially) in parallel on respective computational elements, or using“weak parallelism”, where the tasks are performed in an interleavedmanner, e.g., by time multiplexing of execution threads.

Various components may be described as “configured to” perform a task ortasks. In such contexts, “configured to” is a broad recitation generallymeaning “having structure that” performs the task or tasks duringoperation. As such, the component can be configured to perform the taskeven when the component is not currently performing that task (e.g., aset of electrical conductors may be configured to electrically connect amodule to another module, even when the two modules are not connected).In some contexts, “configured to” may be a broad recitation of structuregenerally meaning “having circuitry that” performs the task or tasksduring operation. As such, the component can be configured to performthe task even when the component is not currently on. In general, thecircuitry that forms the structure corresponding to “configured to” mayinclude hardware circuits.

Various components may be described as performing a task or tasks, forconvenience in the description. Such descriptions should be interpretedas including the phrase “configured to.” Reciting a component that isconfigured to perform one or more tasks is expressly intended not toinvoke 35 U.S.C. § 112(f) interpretation for that component.

FIGS. 1 and 2—Communication System

FIG. 1 illustrates a simplified example wireless communication system,according to some embodiments. It is noted that the system of FIG. 1 ismerely one example of a possible system, and that features of thisdisclosure may be implemented in any of various systems, as desired.

As shown, the example wireless communication system includes a basestation 102A which communicates over a transmission medium with one ormore user devices 106A, 106B, etc., through 106N. Each of the userdevices may be referred to herein as a “user equipment” (UE). Thus, theuser devices 106 are referred to as UEs or UE devices.

The base station (BS) 102A may be a base transceiver station (BTS) orcell site (a “cellular base station”), and may include hardware thatenables wireless communication with the UEs 106A through 106N.

The communication area (or coverage area) of the base station may bereferred to as a “cell.” The base station 102A and the UEs 106 may beconfigured to communicate over the transmission medium using any ofvarious radio access technologies (RATs), also referred to as wirelesscommunication technologies, or telecommunication standards, such as GSM,UMTS (associated with, for example, WCDMA or TD-SCDMA air interfaces),LTE, LTE-Advanced (LTE-A), 5G new radio (5G NR), HSPA, 3GPP2 CDMA2000(e.g., 1×RTT, 1× EV-DO, HRPD, eHRPD), etc. Note that if the base station102A is implemented in the context of LTE, it may alternately bereferred to as an ‘eNodeB’ or ‘eNB’. Note that if the base station 102Ais implemented in the context of 5G NR, it may alternately be referredto as ‘gNodeB’ or ‘gNB’.

As shown, the base station 102A may also be equipped to communicate witha network 100 (e.g., a core network of a cellular service provider, atelecommunication network such as a public switched telephone network(PSTN), and/or the Internet, among various possibilities). Thus, thebase station 102A may facilitate communication between the user devicesand/or between the user devices and the network 100. In particular, thecellular base station 102A may provide UEs 106 with varioustelecommunication capabilities, such as voice, SMS and/or data services.

Base station 102A and other similar base stations (such as base stations102B . . . 102N) operating according to the same or a different cellularcommunication standard may thus be provided as a network of cells, whichmay provide continuous or nearly continuous overlapping service to UEs106A-N and similar devices over a geographic area via one or morecellular communication standards.

Thus, while base station 102A may act as a “serving cell” for UEs 106A-Nas illustrated in FIG. 1, each UE 106 may also be capable of receivingsignals from (and possibly within communication range of) one or moreother cells (which might be provided by base stations 102B-N and/or anyother base stations), which may be referred to as “neighboring cells”.Such cells may also be capable of facilitating communication betweenuser devices and/or between user devices and the network 100. Such cellsmay include “macro” cells, “micro” cells, “pico” cells, and/or cellswhich provide any of various other granularities of service area size.For example, base stations 102A-B illustrated in FIG. 1 might be macrocells, while base station 102N might be a micro cell. Otherconfigurations are also possible.

In some embodiments, base station 102A may be a next generation basestation, e.g., a 5G New Radio (5G NR) base station, or “gNB”. In someembodiments, a gNB may be connected to a legacy evolved packet core(EPC) network and/or to a NR core (NRC) network. In addition, a gNB cellmay include one or more transition and reception points (TRPs). Inaddition, a UE capable of operating according to 5G NR may be connectedto one or more TRPs within one or more gNBs.

Note that a UE 106 may be capable of communicating using multiplewireless communication standards. For example, the UE 106 may beconfigured to communicate using a wireless networking (e.g., Wi-Fi)and/or peer-to-peer wireless communication protocol (e.g., Bluetooth,Wi-Fi peer-to-peer, etc.) in addition to at least one cellularcommunication protocol (e.g., GSM, UMTS (associated with, for example,WCDMA or TD-SCDMA air interfaces), LTE, LTE-A, 5G NR, HSPA, 3GPP2CDMA2000 (e.g., 1×RTT, 1× EV-DO, HRPD, eHRPD), etc.). The UE 106 mayalso or alternatively be configured to communicate using one or moreglobal navigational satellite systems (GNSS, e.g., GPS or GLONASS), oneor more mobile television broadcasting standards (e.g., ATSC-M/H orDVB-H), and/or any other wireless communication protocol, if desired.Other combinations of wireless communication standards (including morethan two wireless communication standards) are also possible.

FIG. 2 illustrates user equipment 106 (e.g., one of the devices 106Athrough 106N) in communication with a base station 102, according tosome embodiments. The UE 106 may be a device with cellular communicationcapability such as a mobile phone, a hand-held device, a computer or atablet, or virtually any type of wireless device.

The UE 106 may include a processor that is configured to execute programinstructions stored in memory. The UE 106 may perform any of the methodembodiments described herein by executing such stored instructions.Alternatively, or in addition, the UE 106 may include a programmablehardware element such as an FPGA (field-programmable gate array) that isconfigured to perform any of the method embodiments described herein, orany portion of any of the method embodiments described herein.

The UE 106 may include one or more antennas for communicating using oneor more wireless communication protocols or technologies. In someembodiments, the UE 106 may be configured to communicate using, forexample, CDMA2000 (1×RTT/1× EV-DO/HRPD/eHRPD) or LTE using a singleshared radio and/or GSM or LTE using the single shared radio. The sharedradio may couple to a single antenna, or may couple to multiple antennas(e.g., for MIMO) for performing wireless communications. In general, aradio may include any combination of a baseband processor, analog RFsignal processing circuitry (e.g., including filters, mixers,oscillators, amplifiers, etc.), or digital processing circuitry (e.g.,for digital modulation as well as other digital processing). Similarly,the radio may implement one or more receive and transmit chains usingthe aforementioned hardware. For example, the UE 106 may share one ormore parts of a receive and/or transmit chain between multiple wirelesscommunication technologies, such as those discussed above.

In some embodiments, the UE 106 may include separate transmit and/orreceive chains (e.g., including separate antennas and other radiocomponents) for each wireless communication protocol with which it isconfigured to communicate. As a further possibility, the UE 106 mayinclude one or more radios which are shared between multiple wirelesscommunication protocols, and one or more radios which are usedexclusively by a single wireless communication protocol. For example,the UE 106 might include a shared radio for communicating using eitherof LTE or 5G NR (or LTE or 1×RTT or LTE or GSM), and separate radios forcommunicating using each of Wi-Fi and Bluetooth. Other configurationsare also possible.

FIG. 3—Block Diagram of a UE

FIG. 3 illustrates an example simplified block diagram of acommunication device 106, according to some embodiments. It is notedthat the block diagram of the communication device of FIG. 3 is only oneexample of a possible communication device. According to embodiments,communication device 106 may be a user equipment (UE) device, a mobiledevice or mobile station, a wireless device or wireless station, adesktop computer or computing device, a mobile computing device (e.g., alaptop, notebook, or portable computing device), a tablet and/or acombination of devices, among other devices. As shown, the communicationdevice 106 may include a set of components 300 configured to performcore functions. For example, this set of components may be implementedas a system on chip (SOC), which may include portions for variouspurposes. Alternatively, this set of components 300 may be implementedas separate components or groups of components for the various purposes.The set of components 300 may be coupled (e.g., communicatively;directly or indirectly) to various other circuits of the communicationdevice 106.

For example, the communication device 106 may include various types ofmemory (e.g., including NAND flash 310), an input/output interface suchas connector I/F 320 (e.g., for connecting to a computer system; dock;charging station; input devices, such as a microphone, camera, keyboard;output devices, such as speakers; etc.), the display 360, which may beintegrated with or external to the communication device 106, andcellular communication circuitry 330 such as for 5G NR, LTE, GSM, etc.,and short to medium range wireless communication circuitry 329 (e.g.,Bluetooth™ and WLAN circuitry). In some embodiments, communicationdevice 106 may include wired communication circuitry (not shown), suchas a network interface card, e.g., for Ethernet.

The cellular communication circuitry 330 may couple (e.g.,communicatively; directly or indirectly) to one or more antennas, suchas antennas 335 and 336 as shown. The short to medium range wirelesscommunication circuitry 329 may also couple (e.g., communicatively;directly or indirectly) to one or more antennas, such as antennas 337and 338 as shown. Alternatively, the short to medium range wirelesscommunication circuitry 329 may couple (e.g., communicatively; directlyor indirectly) to the antennas 335 and 336 in addition to, or insteadof, coupling (e.g., communicatively; directly or indirectly) to theantennas 337 and 338. The short to medium range wireless communicationcircuitry 329 and/or cellular communication circuitry 330 may includemultiple receive chains and/or multiple transmit chains for receivingand/or transmitting multiple spatial streams, such as in amultiple-input multiple output (MIMO) configuration.

In some embodiments, as further described below, cellular communicationcircuitry 330 may include dedicated receive chains (including and/orcoupled to, e.g., communicatively; directly or indirectly. dedicatedprocessors and/or radios) for multiple RATs (e.g., a first receive chainfor LTE and a second receive chain for 5G NR). In addition, in someembodiments, cellular communication circuitry 330 may include a singletransmit chain that may be switched between radios dedicated to specificRATs. For example, a first radio may be dedicated to a first RAT, e.g.,LTE, and may be in communication with a dedicated receive chain and atransmit chain shared with an additional radio, e.g., a second radiothat may be dedicated to a second RAT, e.g., 5G NR, and may be incommunication with a dedicated receive chain and the shared transmitchain.

The communication device 106 may also include and/or be configured foruse with one or more user interface elements. The user interfaceelements may include any of various elements, such as display 360 (whichmay be a touchscreen display), a keyboard (which may be a discretekeyboard or may be implemented as part of a touchscreen display), amouse, a microphone and/or speakers, one or more cameras, one or morebuttons, and/or any of various other elements capable of providinginformation to a user and/or receiving or interpreting user input.

The communication device 106 may further include one or more smart cards345 that include SIM (Subscriber Identity Module) functionality, such asone or more UICC(s) (Universal Integrated Circuit Card(s)) cards 345.

As shown, the SOC 300 may include processor(s) 302, which may executeprogram instructions for the communication device 106 and displaycircuitry 304, which may perform graphics processing and provide displaysignals to the display 360. The processor(s) 302 may also be coupled tomemory management unit (MMU) 340, which may be configured to receiveaddresses from the processor(s) 302 and translate those addresses tolocations in memory (e.g., memory 306, read only memory (ROM) 350, NANDflash memory 310) and/or to other circuits or devices, such as thedisplay circuitry 304, short range wireless communication circuitry 229,cellular communication circuitry 330, connector I/F 320, and/or display360. The MMU 340 may be configured to perform memory protection and pagetable translation or set up. In some embodiments, the MMU 340 may beincluded as a portion of the processor(s) 302.

As noted above, the communication device 106 may be configured tocommunicate using wireless and/or wired communication circuitry. Thecommunication device 106 may be configured to perform a method includingperforming one or more of periodic beam quality measurements and/orevent based beam quality measurements, determining, based at least inpart on one or more of the periodic beam quality measurements and/or theevent based beam quality measurements, a recommended beam qualitymeasurement configuration, and transmitting, to a base station servingthe UE, the recommended beam quality measurement configuration. Inaddition, the UE may perform receiving, from the base station,instructions regarding the beam quality measurement configuration. Theinstructions may include instructions to activate, deactivate, and/ormodify at least one beam quality measurement configuration. In addition,the instructions may be based, at least in part, on the recommend beamquality measurement configuration.

As described herein, the communication device 106 may include hardwareand software components for implementing the above features forrecommending a beam quality measurement configuration. The processor 302of the communication device 106 may be configured to implement part orall of the features described herein, e.g., by executing programinstructions stored on a memory medium (e.g., a non-transitorycomputer-readable memory medium). Alternatively (or in addition),processor 302 may be configured as a programmable hardware element, suchas an FPGA (Field Programmable Gate Array), or as an ASIC (ApplicationSpecific Integrated Circuit). Alternatively (or in addition) theprocessor 302 of the communication device 106, in conjunction with oneor more of the other components 300, 304, 306, 310, 320, 329, 330, 340,345, 350, 360 may be configured to implement part or all of the featuresdescribed herein.

In addition, as described herein, processor 302 may include one or moreprocessing elements. Thus, processor 302 may include one or moreintegrated circuits (ICs) that are configured to perform the functionsof processor 302. In addition, each integrated circuit may includecircuitry (e.g., first circuitry, second circuitry, etc.) configured toperform the functions of processor(s) 302.

Further, as described herein, cellular communication circuitry 330 andshort range wireless communication circuitry 329 may each include one ormore processing elements. In other words, one or more processingelements may be included in cellular communication circuitry 330 and,similarly, one or more processing elements may be included in shortrange wireless communication circuitry 329. Thus, cellular communicationcircuitry 330 may include one or more integrated circuits (ICs) that areconfigured to perform the functions of cellular communication circuitry330. In addition, each integrated circuit may include circuitry (e.g.,first circuitry, second circuitry, etc.) configured to perform thefunctions of cellular communication circuitry 230. Similarly, the shortrange wireless communication circuitry 329 may include one or more ICsthat are configured to perform the functions of short range wirelesscommunication circuitry 32. In addition, each integrated circuit mayinclude circuitry (e.g., first circuitry, second circuitry, etc.)configured to perform the functions of short range wirelesscommunication circuitry 329.

FIG. 4—Block Diagram of a Base Station

FIG. 4 illustrates an example block diagram of a base station 102,according to some embodiments. It is noted that the base station of FIG.4 is merely one example of a possible base station. As shown, the basestation 102 may include processor(s) 404 which may execute programinstructions for the base station 102. The processor(s) 404 may also becoupled to memory management unit (MMU) 440, which may be configured toreceive addresses from the processor(s) 404 and translate thoseaddresses to locations in memory (e.g., memory 460 and read only memory(ROM) 450) or to other circuits or devices.

The base station 102 may include at least one network port 470. Thenetwork port 470 may be configured to couple to a telephone network andprovide a plurality of devices, such as UE devices 106, access to thetelephone network as described above in FIGS. 1 and 2.

The network port 470 (or an additional network port) may also oralternatively be configured to couple to a cellular network, e.g., acore network of a cellular service provider. The core network mayprovide mobility related services and/or other services to a pluralityof devices, such as UE devices 106. In some cases, the network port 470may couple to a telephone network via the core network, and/or the corenetwork may provide a telephone network (e.g., among other UE devicesserviced by the cellular service provider).

In some embodiments, base station 102 may be a next generation basestation, e.g., a 5G New Radio (5G NR) base station, or “gNB”. In suchembodiments, base station 102 may be connected to a legacy evolvedpacket core (EPC) network and/or to a NR core (NRC) network. Inaddition, base station 102 may be considered a 5G NR cell and mayinclude one or more transition and reception points (TRPs). In addition,a UE capable of operating according to 5G NR may be connected to one ormore TRPs within one or more gNB s.

The base station 102 may include at least one antenna 434, and possiblymultiple antennas. The at least one antenna 434 may be configured tooperate as a wireless transceiver and may be further configured tocommunicate with UE devices 106 via radio 430. The antenna 434communicates with the radio 430 via communication chain 432.Communication chain 432 may be a receive chain, a transmit chain orboth. The radio 430 may be configured to communicate via variouswireless communication standards, including, but not limited to, 5G NR,LTE, LTE-A, GSM, UMTS, CDMA2000, Wi-Fi, etc.

The base station 102 may be configured to communicate wirelessly usingmultiple wireless communication standards. In some instances, the basestation 102 may include multiple radios, which may enable the basestation 102 to communicate according to multiple wireless communicationtechnologies. For example, as one possibility, the base station 102 mayinclude an LTE radio for performing communication according to LTE aswell as a 5G NR radio for performing communication according to 5G NR.In such a case, the base station 102 may be capable of operating as bothan LTE base station and a 5G NR base station. As another possibility,the base station 102 may include a multi-mode radio which is capable ofperforming communications according to any of multiple wirelesscommunication technologies (e.g., 5G NR and Wi-Fi, LTE and Wi-Fi, LTEand UMTS, LTE and CDMA2000, UMTS and GSM, etc.).

As described further subsequently herein, the BS 102 may includehardware and software components for implementing or supportingimplementation of features described herein. The processor 404 of thebase station 102 may be configured to implement or supportimplementation of part or all of the methods described herein, e.g., byexecuting program instructions stored on a memory medium (e.g., anon-transitory computer-readable memory medium). Alternatively, theprocessor 404 may be configured as a programmable hardware element, suchas an FPGA (Field Programmable Gate Array), or as an ASIC (ApplicationSpecific Integrated Circuit), or a combination thereof. Alternatively(or in addition) the processor 404 of the BS 102, in conjunction withone or more of the other components 430, 432, 434, 440, 450, 460, 470may be configured to implement or support implementation of part or allof the features described herein.

In addition, as described herein, processor(s) 404 may be comprised ofone or more processing elements. In other words, one or more processingelements may be included in processor(s) 404. Thus, processor(s) 404 mayinclude one or more integrated circuits (ICs) that are configured toperform the functions of processor(s) 404. In addition, each integratedcircuit may include circuitry (e.g., first circuitry, second circuitry,etc.) configured to perform the functions of processor(s) 404.

Further, as described herein, radio 430 may be comprised of one or moreprocessing elements. In other words, one or more processing elements maybe included in radio 430. Thus, radio 430 may include one or moreintegrated circuits (ICs) that are configured to perform the functionsof radio 430. In addition, each integrated circuit may include circuitry(e.g., first circuitry, second circuitry, etc.) configured to performthe functions of radio 430.

Bandwidth Parts in 5G NR

It is anticipated that 5G NR may partition the available bandwidth for acommunication session between a UE and a gNB into multiple bandwidthparts (BWPs). At any given time, only one of the BWPs may be activelyused at a time, and the BWP being used may be referred to as the activeBWP. The active BWP may switch over time, and the switching betweenactive BWPs may be directed by downlink control information (DCI)messages, and/or it may be based on a timer. For example, when a UE hasdata to be transmitted, DCI received from the gNB may direct the UE touse a particular BWP as the active BWP for the data transmission. Insome embodiments, the UE may switch back to a default active BWP once atimer expires.

When conducting PDCCH grant monitoring, it may be desirable for a UE tooperate at the minimum bandwidth BWP that is able to accomplish PDCCHgrant monitoring, to save power. It is anticipated that up to 4 BWPs maybe configured for 5G NR, and the particular choice of an active BWP mayvary according to different specific implementations.

A UE may supply feedback for the active BWP in a preference andbeamforming report, but the UE may not supply feedback for inactiveBWPs. For example, in current NR standards, the UE may not berequired/expected to measure/report quality of BWPs that are configuredbut not yet activated. However, a UE may be expected to perform CSImeasurements within its active downlink (DL).

In some embodiments, a gNB may switch a UE to an active BWP to conductradio measurements, such as a channel state information reference signal(CSI-RS) on downlink (DL) and/or a sounding reference signal (SRS) onuplink (UL). In general, scheduling these measurements may requireadditional messaging and power drain. Autonomous measurement by a UE onother configured but non-active BWPs may be difficult and/or notfeasible given that the UE may not be informed of CSI-RS scheduling onthe particular BWP to be measured, such that it may be advantageous forthe network to coordinate the measurements.

Even though channel quality indicators (CQIs), beamforming, and SRS maybe reported based on the current active BWP, the measurements may leadto inaccuracies if the active BWP is switched to other active BWPs fordata transmission, and the measurements are not updated with sufficientfrequency (i.e., if measurements have not been performed since theactive BWP was switched). Current implementations may use an outer loopmethod whereby the gNB may not know the CQI of a particular active BWP,but may probe different transmission parameters (e.g. differentfrequencies or other parameters such as different modulation codingschemes (MCS) and/or different transport block sizes (TBS)) to determinewhich parameters give the UE a higher throughput. However, these outerloop methods may take a significant amount of time to converge, therebyincreasing network latency.

Embodiments herein present a systematic design to coordinate active BWPswitching for data transmission and channel measurements to reduceoverhead on the network and at the UE and gNB.

Hierarchical CDRX Configuration

In some embodiments, a hierarchical connected mode discontinuousreception (CDRX) configuration may be employed with two or more levelsof CDRX sub-configurations. Each sub-configuration may share the sameCDRX cycle but may be scheduled on different BWPs. In some embodiments,a higher level CDRX sub-configuration may overwrite a lower levelsub-configuration. At any particular CDRX ON period, a UE may only wakeup on one active BWP for data transmission and/or channel measurements.

A gNB may activate and/or deactivate sub-configurations. Additionally oralternatively, the gNB may change the sub-configuration of configuredBWPs using media access control-control elements (MAC-CE).

In some embodiments, up to four sub-configurations may be configured forup to four BWPs. Each BWP may be activated and deactivated using MAC-CE.Furthermore, a BWP that is configured for a particular sub-configurationmay be changed through MAC-CE. For example, MAC-CE may be used by thegNB to activate and/or deactivate sub-configurations, and/or MAC-CE maybe used by the gNB to change the BWP associated with one or moresub-configurations, without necessarily changing the active status ofthe one or more sub-configurations. For example, as explained in furtherdetail below, if a first BWP that is currently assigned to a high-levelsub-configuration is determined (e.g., based on channel measurements) tobe experiencing better channel conditions than a second BWP that is thecurrent mid-level BWP, the first BWP may replace the second BWP as themid-level BWP, and the second BWP may be switched to become a high-levelBWP.

In some embodiments, to facilitate BWP management, there may be threelevels of CDRX sub-configurations. First, a low-level sub-configurationmay be configured as the default BWP which may be the most frequentlyused (i.e., active) sub-configuration. In exemplary embodiments, thedefault BWP may be configured in the baseband frequency and at a smallerbandwidth than the mid-level and high-level configurations. The defaultBWP may be active for each CDRX cycle, unless a higher level CDRXsub-configuration is active for that CDRX cycle, in which case thehigher level CDRX sub-configuration may overwrite the lower leveldefault sub-configuration.

Second, a mid-level sub-configuration may be configured as atransmission BWP, which may be the preferred configuration for datatransmission, which may be used less frequently than the low-levelsub-configuration. The mid-level sub-configuration may be configured fora wider bandwidth BWP than the low-level (default) sub-configuration,which may enable it to function more effectively for data throughput.

Third, a high-level sub-configuration may be configurated as a restingBWP, which may be used less frequently than the low- and mid-levelsub-configurations. For example, there may be two or more BWPs which areconfigured as high-level sub-configurations, which may be infrequentlyused for channel measurements. The mid-level and high-levelsub-configurations may be reallocated to different BWPs depending on theresults of the channel measurements. For example, if a high-level BWP isdetermined to have higher quality channel conditions than the currentmid-level BWP, the gNB may reconfigure the high-level BWP to have amid-level sub-configuration.

In some embodiments each level except for the default (low-level) BWPmay be configured with its own periodicity T_(p) and inactivity timerT_(i), which may be measured in terms of fractions of the CDRX cyclelength. The periodicity T_(p) may specify the number of CDRX cyclesafter which the mid-level and/or high-level BWP may repeat itsactivation schedule. The inactivity timer T_(i) may specify the numberof CDRX cycles for which the mid-level and high-level BWP will remainactive each time it is activated. For example, as illustrated in FIG. 5,a default BWP is used at the baseband for the first three CDRX cycles.Then, the mid-level BWP, at a higher frequency and with a widerbandwidth than the default BWP, is activated for T_(i) CDRX cycles,overriding the default BWP (the default BWP is not active for theseT_(i) CDRX cycles). Subsequently (after the T_(i) CDRX cycles), thedefault BWP may resume activity until T_(p) CDRX cycles have transpiredsince the mid-level BWP was activated, at which point the mid-level BWPmay reactivate for another T_(i) CDRX cycles.

FIGS. 6-7 Comparison of Hierarchical CDRX Sub-Configurations with LegacyImplementations

FIGS. 6 and 7 illustrate a comparison between an existing implementationfor configuration of BWPs and some embodiments described herein. Forexample, FIG. 6 illustrates how, in some existing implementations, BWPsmay be activated in an ad hoc manner, resulting in extra communicationlatency as the UE must be informed of the change in BWP activationstatus, and a BWP switch timer may have to expire before communicationcan commence on a newly activated BWP. In contrast, FIG. 7 illustrateshow systematic scheduling of 3 hierarchical sub-configurations mayreduce network latency and power expenditure by scheduling specific BWPsto activate at particular CDRX cycles, each for a particular number ofconsecutive CDRX cycles, before reverting to activation of the defaultBWP.

Embodiments herein present a systematic methodology to coordinate activeBWPs for data transmission and channel measurements. Flexible CDRXsub-configurations may be employed which periodically switch betweenactive BWPs. Radio resource management (RRM) and CSI measurements, aswell as data transmissions, may be performed on the currently activeBWP. Advantageously, this may extend the UE's off period and may alsoenable periodic CSI-RS measurements on BWPs, as interruptions to thecurrent CDRX OFF period may be avoided (e.g., interruptions may occurmore frequently using an ad-hoc measurement assignment). According toembodiments described herein, a measurement may be initiatedsimultaneously (or substantially simultaneously) with the initiation ofthe CDRX ON duration. Power may be saved by the UE by avoiding extrawakeup periods for conducting measurements. Additionally, bysystematically scheduling the active BWPs, the UE may no longer need towait for a BWP switch timer when changing the active BWP.

By allowing the gNB to decide a UE's BWP selection, convergence time fordata transmission may be reduced. Additionally, the lower schedulinggranularity of a wider BWP per UE may reduce scheduling difficulties forscheduling wakeup signals (WUS) and/or go-to-sleep signals (GSS). Forexample, it is anticipated that NR 5G may employ WUS and/or GSS, andscheduling for WUS and/or GSS may involve the gNB taking intoconsideration each UE's CDRX on/off status and DL buffer status topredict whether signals may be sent.

FIG. 8—Configuration of Default, Transmission, and Resting BWPs

FIG. 8 is a flowchart diagram illustrating an exemplary method forconfiguring one or more of a default, transmission, and resting BWP fora CDRX communication session. The method shown in FIG. 8 may be used inconjunction with any of the computer systems or devices shown in theabove Figures, among other devices. As one possibility, the method ofFIG. 8 may be implemented by a base station (BS) 102 (e.g., an eNB or agNB) illustrated in and described with respect to FIGS. 1-2 and 4. TheBS 102 may comprise a radio and a processing element operably coupled tothe radio. In various embodiments, some of the elements of the methodshown may be performed concurrently, in a different order than shown, ormay be omitted. Additional elements may also be performed as desired. Asshown, the method may operate as follows.

At 802, a first bandwidth part (BWP) may be configured as a default BWPfor a connected mode discontinuous reception (CDRX) communicationsession with a user equipment device (UE). In some embodiments, beingconfigured as the default BWP causes the first BWP to be an active BWPunless it is overridden.

At 804, a second BWP may be configured as a transmission BWP for theCDRX communication session with the UE. In some embodiments, beingconfigured as a transmission BWP causes the second BWP to periodicallyoverride the first BWP as the active BWP.

The second BWP may be configured as the transmission BWP based at leastin part on channel conditions experienced by the second BWP. Forexample, the second BWP may be configured as the transmission BWP basedat least in part on the second BWP experiencing desirable channelconditions (e.g., better channel conditions than a third and/or fourthBWP that is also considered as a candidate to become the transmissionBWP). The first BWP may be located at a baseband frequency, and thesecond BWP may have a wider bandwidth than the first BWP. Thetransmission BWP may periodically override the default BWP as the activeBWP to enable the UE to more effectively transmit uplink data, byutilizing the wider bandwidth of the transmission BWP. However, thedefault BWP may serve as the active BWP for a larger portion of eachCDRX cycle, thereby preserving energy because the default BWP is atbaseband and has a more narrow band than the transmission BWP.

The transmission BWP may periodically override the first BWP as theactive BWP for a predetermined number of CDRX cycles. In someembodiments, the BS may notify the UE through a downlink controlinformation (DCI) message to reactivate the first BWP as the active BWPbefore expiration of the predetermined number of CDRX cycles.

In some embodiments, the BS may utilize media access control-controlelements (MAC-CE) to activate or deactivate one or both of the defaultBWP and the transmission BWP.

At 806, one or more third BWPs may be configured as resting BWPs for theCDRX communication session with the UE. In these embodiments, beingconfigured as the resting BWP may cause the resting BWP to beperiodically activated (i.e., the resting BWP may periodically overridethe default BWP as the active BWP) for performing channel measurements.Note that configuration of one or more resting BWPs is optional, andstep 806 may be omitted in some embodiments.

In some embodiments, the base station may determine based at least inpart on the channel measurements that the third BWP is experiencingbetter channel conditions than the second BWP. Based at least in part onthis determination, the BS may reallocate the third BWP as thetransmission BWP and the second BWP as the resting BWP. Channelconditions may change and/or drift over time, and periodic channelmeasurements may be utilized to dynamically alter which BWPs areconfigured as the transmission and resting BWPs, such that the BWPexperiencing the best channel. conditions of the available BWPs may beconfigured as the transmission BWP, to improve data transmissionperformance by the UE.

In some embodiments, the channel measurements are performed by the UE onthe resting BWP, and the channel measurements are supplied by the UE tothe BS. The BS may reallocate the third BWP as the transmission BWP andthe second BWP as the resting BWP by utilizing media accesscontrol-control elements (MAC-CE).

In some embodiments, each of the transmission BWP and the resting BWPmay be configured with their own respective periodicity and inactivitytimer durations. For example, the transmission BWP may periodicallyoverride the default BWP as the active BWP with a first periodicityT_(p,t), and the resting BWP may periodically override the default BWPas the active BWP with a second periodicity T_(p,r). Each of theperiodicities T_(p,t) and T_(p,a) may specify a number of CDRX cyclesafter which the respective BWP may repeat its activation schedule.Furthermore, the transmission BWP and the resting BWP may berespectively configured with inactivity timers T_(i,t) and T_(i,r) thatspecify a duration of their respective active BWP override procedures.For example, the inactivity timers may specify a number of CDRX cyclesfor which the respective BWP will override the default BWP as the activeBWP. In some embodiments, each of the two periodicities and the twoinactivity timer durations may be selected such that the transmissionBWP and the resting BWP do not conflict in their respective attempts tooverride the default BWP as the resting BWP. For example, the valuesT_(p,t), T_(p,r), T_(i,t), T_(i,r) may be selected such that thetransmission BWP and the resting BWP do not override the default BWP asthe active BWP at the same time (e.g., as illustrated in FIG. 7).

FIG. 9—Conducting Beamforming Measurements Using BWP Sub-Configurations

FIG. 9 illustrates a method for conducting beam-forming and/or othermeasurements using BWP sub-configurations, according to someembodiments. As illustrated, an activated mid-level transmission BWP maybe used to perform beamforming tracking. In some embodiments, a PDCCHgrant may be employed without PDSCH, enabling channel measurementswithout interrupting the CDRX timeline. For example, an indication maybe given to a UE to sleep after X symbols in the current CDRX On periodduring which measurements are conducted with a signaled symbol-levelCSI-RS transmission configuration indicator (TCI), quasi collocation(QCL), and/or SRS pattern. For example, the signaled symbol level CSI-RSpattern may describe the CSI-RS resource mapping for the next X symbols,which may correspond to the TX/RX beamforming indications on aconfigured TCI table. As a specific example, the PDCCH DCI may informthe UE of an upcoming TCI pattern (i.e., a transmit beamformingpattern), and may specify to the UE that, e.g., the next 6 symbols maybe 1, 1, 4, 4, 3, 3. The UE may then lookup these symbols in aconfigured TCI table to determine which beamforming sweep pattern willbe used by the gNB and to prepare a corresponding Rx beamformingpattern. Similarly, in SRS on the uplink, a gNB may instruct the UE totransmit using a particular Tx beamforming pattern.

An indication may be given to the UE to convert a BWP back to a lowerlevel CDRX sub-configuration. The UE may thereby skip the rest of theT_(i) duration for the particular CDRX cycle, thereby saving power.PUCCH resources may be employed to inform the gNB of the measurementresults. Based on the measurement results, and further based on othermeasurement results of other BWPs (e.g., high-level resting BWPs), thegNB may determine to alter the sub-configurations of one or more of theBWPs. In various embodiments, the current UL DCI formats may bemodified, or a new DCI protocol may be implemented. Beamforming and RRMmeasurements may be combined in a way that balances between beamtracking time and the on duration of the active BWP. In other words, theamount of time and resources used for beamforming tracking and RRMmeasurement may be dynamically balanced based on the current situation.For example, if a UE's channel quality is not very good on the currentlyactive BWP, more time may be allocated to beamforming tracking (e.g.,tracking more beams) to find a better beamforming direction. As anotherexample, a UE may be in a relative instable state (rotating frequently,for example), and more resources may be spent on beamforming tracking.Alternatively, if UE is relatively stable (e.g., such that the currentbeamforming quality may be sufficient and may not require constantupdates), the RRM may be given more time so that a more accurate CQI maybe measured.

The following numbered paragraphs describe additional embodimentsrelated to beamforming tracking.

In some embodiments, a method is performed by a base station. The methodmay include configuring a first bandwidth part (BWP) as a default BWPfor a connected mode discontinuous reception (CDRX) communicationsession with a user equipment device (UE), wherein being configured asthe default BWP causes the first BWP to be an active BWP unless it isoverridden.

The method may further include configuring a second BWP as atransmission BWP for the CDRX communication session with the UE, whereinbeing configured as a transmission BWP causes the second BWP toperiodically override the first BWP as the active BWP, wherein beingconfigured as a transmission BWP further causes the UE to utilize thesecond BWP for performing beamforming tracking during a CDRX cycle inwhich the second BWP overrides the first BWP as the active BWP.

In some embodiments, in performing beamforming tracking, the UE utilizesa beamforming sweep schedule received from the base station via downlinkcontrol information (DCI).

In some embodiments, the method further includes utilizing, by the basestation, downlink control information (DCI) to notify the UE to go tosleep a predetermined number of symbols after the second BWP overridesthe first BWP as the active BWP.

In some embodiments, the first BWP becomes the active BWP on asubsequent CDRX cycle immediately following the CDRX cycle in when thesecond BWP is utilized for performing beamforming tracking.

It is well understood that the use of personally identifiableinformation should follow privacy policies and practices that aregenerally recognized as meeting or exceeding industry or governmentalrequirements for maintaining the privacy of users. In particular,personally identifiable information data should be managed and handledso as to minimize risks of unintentional or unauthorized access or use,and the nature of authorized use should be clearly indicated to users.

Embodiments of the present disclosure may be realized in any of variousforms. For example, some embodiments may be realized as acomputer-implemented method, a computer-readable memory medium, or acomputer system. Other embodiments may be realized using one or morecustom-designed hardware devices such as ASICs. Still other embodimentsmay be realized using one or more programmable hardware elements such asFPGAs.

In some embodiments, a non-transitory computer-readable memory mediummay be configured so that it stores program instructions and/or data,where the program instructions, if executed by a computer system, causethe computer system to perform a method, e.g., any of the methodembodiments described herein, or, any combination of the methodembodiments described herein, or, any subset of any of the methodembodiments described herein, or, any combination of such subsets.

In some embodiments, a device (e.g., a UE 106) may be configured toinclude a processor (or a set of processors) and a memory medium, wherethe memory medium stores program instructions, where the processor isconfigured to read and execute the program instructions from the memorymedium, where the program instructions are executable to implement anyof the various method embodiments described herein (or, any combinationof the method embodiments described herein, or, any subset of any of themethod embodiments described herein, or, any combination of suchsubsets). The device may be realized in any of various forms.

Although the embodiments above have been described in considerabledetail, numerous variations and modifications will become apparent tothose skilled in the art once the above disclosure is fully appreciated.It is intended that the following claims be interpreted to embrace allsuch variations and modifications.

What is claimed is:
 1. A method, comprising: by a base station,configuring a first bandwidth part (BWP) as a default BWP for aconnected mode discontinuous reception (CDRX) communication session witha user equipment device (UE), wherein being configured as the defaultBWP causes the first BWP to be an active BWP unless it is overridden;configuring a second BWP as a transmission BWP for the CDRXcommunication session with the UE, wherein being configured as thetransmission BWP causes the second BWP to periodically override thefirst BWP as the active BWP with a predetermined fixed periodicity, andwherein said periodically overriding the first BWP as the active BWP isperformed via systematic scheduling; utilizing downlink controlinformation (DCI) to notify the UE to go to sleep a predetermined numberof symbols after the second BWP overrides the first BWP as the activeBWP; configuring one or more third BWPs as resting BWPs for the CDRXcommunication session with the UE, wherein being configured as theresting BWP causes the resting BWP to be periodically activated forperforming channel measurements; and reallocating the third BWP as thetransmission BWP and the second BWP as the resting BWP based at least inpart on determining that the third BWP is experiencing better channelconditions than the second BWP.
 2. The method of claim 1, wherein thesecond BWP is configured as the transmission BWP based at least in parton channel conditions experienced by the second BWP.
 3. The method ofclaim 1, wherein the transmission BWP periodically overrides the firstBWP as the active BWP for a predetermined number of CDRX cycles.
 4. Themethod of claim 3, the method further comprising: by the base station:notifying the UE through a downlink control information (DCI) message toreactivate the first BWP as the active BWP before expiration of thepredetermined number of CDRX cycles.
 5. The method of claim 1, themethod further comprising: by the base station: utilizing media accesscontrol-control elements (MAC-CE) to activate or deactivate one or moreof the default BWP and the transmission BWP.
 6. The method of claim 1,wherein channel measurements are performed by the UE on the resting BWP,and wherein the channel measurements are supplied by the UE to the basestation.
 7. The method of claim 1, wherein the base station reallocatesthe third BWP as the transmission BWP and the second BWP as the restingBWP by utilizing media access control-control elements (MAC-CE).
 8. Themethod of claim 1, wherein the first BWP is located at a basebandfrequency, and wherein the second BWP has a wider bandwidth than thefirst BWP.
 9. A base station, comprising: an antenna; a radio coupled tothe antenna; and a processing element coupled to the radio, wherein thebase station is configured to: configure a first bandwidth part (BWP) asa default BWP for a connected mode discontinuous reception (CDRX)communication session with a user equipment device (UE), wherein beingconfigured as the default BWP causes the first BWP to be an active BWPunless it is overridden; configure a second BWP as a transmission BWPfor the CDRX communication session with the UE, wherein being configuredas a transmission BWP causes the second BWP to periodically override thefirst BWP as the active BWP with a predetermined fixed periodicity, andwherein said periodically overriding the first BWP as the active BWP isperformed via systematic scheduling; utilize downlink controlinformation (DCI) to notify the UE to go to sleep a predetermined numberof symbols after the second BWP overrides the first BWP as the activeBWP; configure one or more third BWPs as resting BWPs for the CDRXcommunication session with the UE, wherein being configured as theresting BWP causes the resting BWP to be periodically activated forperforming channel measurements; and reallocate the third BWP as thetransmission BWP and the second BWP as the resting BWP based at least inpart on determining that the third BWP is experiencing better channelconditions than the second BWP.
 10. The base station of claim 9, whereinthe second BWP is configured as the transmission BWP based at least inpart on channel conditions experienced by the second BWP.
 11. The basestation of claim 9, wherein the transmission BWP periodically overridesthe first BWP as the active BWP for a predetermined number of CDRXcycles.
 12. The base station of claim 11, wherein the base station isfurther configured to: notify the UE through a downlink controlinformation (DCI) message to reactivate the first BWP as the active BWPbefore expiration of the predetermined number of CDRX cycles.
 13. Thebase station of claim 9, wherein the base station is further configuredto: utilize media access control-control elements (MAC-CE) to activateor deactivate one or more of the default BWP and the transmission BWP.14. A non-transitory computer-readable memory medium comprising programinstructions that, when executed by a processor of a base station, causethe base station to: configure a first bandwidth part (BWP) as a defaultBWP for a connected mode discontinuous reception (CDRX) communicationsession with a user equipment device (UE), wherein being configured asthe default BWP causes the first BWP to be an active BWP unless it isoverridden; configure a second BWP as a transmission BWP for the CDRXcommunication session with the UE, wherein being configured as atransmission BWP causes the second BWP to periodically override thefirst BWP as the active BWP with a predetermined fixed periodicity, andwherein said periodically overriding the first BWP as the active BWP isperformed via systematic scheduling; utilize downlink controlinformation (DCI) to notify the UE to go to sleep a predetermined numberof symbols after the second BWP overrides the first BWP as the activeBWP; configure one or more third BWPs as resting BWPs for the CDRXcommunication session with the UE, wherein being configured as theresting BWP causes the resting BWP to be periodically activated forperforming channel measurements; and reallocate the third BWP as thetransmission BWP and the second BWP as the resting BWP based at least inpart on determining that the third BWP is experiencing better channelconditions than the second BWP.
 15. The non-transitory computer-readablememory medium of claim 14, wherein the first BWP is located at abaseband frequency, and wherein the second BWP has a wider bandwidththan the first BWP.
 16. The method of claim 1, wherein, when the secondBWP overrides the first BWP as the active BWP during a CDRX cycle, thesecond BWP is utilized for beamforming tracking.
 17. The method of claim16, the method further comprising: the base station, sending, to the UE,a beamforming sweep schedule via downlink control information (DCI). 18.The method of claim 16, wherein the first BWP becomes the active BWP ona subsequent CDRX cycle immediately following the CDRX cycle in when thesecond BWP is utilized for performing beamforming tracking.
 19. The basestation of claim 9, wherein, when the second BWP overrides the first BWPas the active BWP during a CDRX cycle, the second BWP is utilized forbeamforming tracking.